That's the previous gen though: A4 vs A5 cpu, 720p vs 1080p video, 2.4ghz wireless n vs 5ghz, no Siri (I don't know if iOS 6 added or not, but the product comparison page doesn't list it), 3.5" vs 4" screen, and Bluetooth 2.1 vs 4.0. There are numerous hardware differences between the mini and 4th gen, but it looks like the 5th gen and mini compare pretty closely on hardware.
I think the idea was to compare a similarly equipped iPod with the mini. So I can see the price comparisons between the 5th gen iPod touch and the mini, but not the 4th gen.